Scilab Function
Last update : April 1993

macro - Scilab procedure and Scilab object

### Description

Macros are Scilab procedures ("macro", "function" and "procedure" have the save meaning). Usually, they are defined in files with an editor and loaded into Scilab by `getf` or through a library.

They can also be defined on-line (see `deff`). A file which contains a macro must begin as follows:

    function [y1,...,yn]=foo(x1,...,xm)

The `yi` are output variables calculated as functions of input variables and variables existing in Scilab when the macro is executed. A macro can be compiled for faster execution. Collections of macros can be collected in libraries. Macros which begin with `%` sign (e.g. `%foo`) and whose arguments are lists are used to perform specific operations: for example, `z=%rmr(x,y)` is equivalent to `z=x*y` when `x` and `z` are rationals (i.e. `x=list('r',n,d,[])` with `n` and `d` polynomials).

### See Also

`deff`, `getf`, `comp`, `lib`,